The developing process of this invention comprises supplying a charged toner to a development roller disposed against a photosensitive drum, forming a thin layer of the charged toner on the development roller by a blade press-contacted with the development roller, and contacting this thin layer of the charged toner on the surface of the photosensitive drum on which an electrostatic latent image is formed. The process further comprises using a non-magnetic toner which has a circularity degree of more than 0.94 and which has a falling amount of at least 10 g/5 minutes as measured by a tester for measuring the amount of falling. By using such a toner, it is possible to prevent the collection of the toner on the bottom of a development housing which includes various members for practicing the above process, and it is also possible to prevent the rising of a driving torque of the rollers. The development process of this invention is particularly effectively applied to laser prints or facsimiles containing an ultra-small sized development unit.